WO2006035927A1

WO2006035927A1 - Wall hanging type indoor unit for air conditioner

Info

Publication number: WO2006035927A1
Application number: PCT/JP2005/018097
Authority: WO
Inventors: Takayuki Takahashi; Zhiming Zheng; Kouichi Yasuo; Hyunyoung Kim; Noriki Nishiguchi
Original assignee: Daikin Industries, Ltd.
Priority date: 2004-09-30
Filing date: 2005-09-30
Publication date: 2006-04-06
Also published as: JP2006105416A

Abstract

A wall hanging type indoor unit for an air conditioner has a body casing (1) having on its front side a first suction grill (2) and having on its lower part a blowout grill (4), finned-tube heat exchangers (5a, 5b) arranged in the shape of a broken line, as seen from a side, in the body casing (1), sirocco fans (11) arranged below the finned-tube heat exchangers (5a, 5b) such that a rotating shaft (13) of the fans is in parallel to the front side of the body casing (1).

Description

Wall-mounted indoor unit of air conditioner

Technical field

[0001] The present invention relates to a wall-mounted air conditioner. More specifically, the present invention relates to a device arrangement structure for a wall-mounted indoor unit of an air conditioner that is suitable for reducing the thickness.

Background art

[0002] A wall-mounted indoor unit of an air conditioner is designed to be harmonized with a room by reducing the depth dimension. Japanese Unexamined Patent Publication No. 62-213620 discloses such an indoor unit. In this indoor unit, the main body casing has a suction drill and a blow grill at the upper front part and lower front part, respectively. Inside the main casing, a flat box-shaped heat exchanger with fins in a flat box shape is arranged in a vertical direction at a position facing the suction grille, and a cross-flow fan below the heat exchanger Is placed.

In recent years, in order to save energy in indoor units, the heat exchange area of the finned tube heat exchanger is designed to be large. For this reason, in the case where the heat exchanger extends in the vertical direction as in a conventional air conditioner, it is necessary to increase the ventilation area in order to increase the heat exchange area of the heat exchanger. However, if the ventilation area is large, there is a problem that the front area of the indoor unit becomes too large.

[0004] Also, in the indoor unit described above, if the number of heat exchangers is increased to increase the heat exchange area, the ventilation resistance of the heat exchange ^^ increases, and the cross flow fan has insufficient static pressure. Problems arise. As a result, in recent wall-mounted indoor units, the heat exchanger is formed in two or three folds so as to surround the upper part of the cross flow fan, thereby increasing the heat exchange area and heat. It is configured to improve the ability of exchange ^^. Such wall-mounted indoor units for air conditioners are disclosed in JP-A-9-243103, JP-A-10-132371 and JP-A-2000-329364. Disclosure of the invention

Problems to be solved by the invention

However, the above-described conventional wall-mounted indoor unit of an air conditioner has a main body case. The front area of the ring itself is not much different from the conventional one, but the heat exchange is formed in two or three folds, so the depth dimension is larger. As a result, the size of the indoor unit protruding from the wall surface of the room has increased, and it has become impossible to achieve harmony with the room. For this reason, recently, there has been a demand for the development of a thin heat exchange indoor unit that does not reduce energy efficiency.

[0006] The present invention has been made based on such a background, and an object thereof is to provide a wall-mounted indoor unit of an air conditioner that is reduced in thickness without deteriorating the performance of a heat exchanger.

Means for solving the problem

[0007] A wall-hanging indoor unit of an air conditioner according to the present invention has been made to solve the above problems, and the first invention has a first suction grill on the front surface and a blow-off grill on the lower side. The main body casing with fins, the finned tube type heat exchange arranged in a polygonal line in the main body casing, and the finned tube type heat exchange so that the rotation axis is parallel to the front surface of the main body casing. It is characterized by having multiple sirocco fans arranged below ^^.

[0008] In one aspect, the plurality of sirocco fans are arranged so that the blowout side communicates with the blowout grill.

[0009] In another aspect, the main body casing has a second suction grill on the upper surface, and the finned tube heat exchanger has a straight line parallel to the front grill, and a front upper portion to a rear lower portion. It is arranged in the shape of a double fold mountain that combines with an inclined straight line.

[0010] In yet another aspect, the plurality of sirocco fans have their outlets directed obliquely downward via a partition plate that partitions the inside of the main body casing into a suction side and a blowout side.

[0011] Further, the plurality of sirocco fans are attached to the rotating shaft of one drive motor.

FIG. 1 is a front view of a wall-mounted indoor unit of an air conditioner according to the present invention.

2 is a device layout diagram taken along line 2-2 in FIG.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a wall-mounted indoor unit of an air conditioner according to an embodiment of the present invention will be described with reference to FIGS.

As shown in FIG. 2, the main body casing 1 has a first suction grill 2 on the front surface and a second suction grill 3 on the upper surface. The main casing 1 has a blow grill 4 at the bottom. The details of the first suction grill 2, the second suction grill 3 and the blowout grill 4 are not shown. Only the locations where these are arranged are shown. Inside the main casing 1, the finned tube heat exchanger 5 has an inverted V-shape that is a combination of a straight line extending up and down parallel to the first suction grill 2 and a straight line inclined from the front upper part to the rear lower part. It is arranged. That is, one heat exchanger 5a is arranged linearly in the vertical direction facing the first suction grill 2, and the other heat exchanger 5b is connected to the casing 1 from the upper part on the rear surface side of the one heat exchanger 5a. It is arranged in a straight line below the rear surface.

[0015] A multiple sirocco fan 10 is disposed below these heat exchangers 5a and 5b. The rotational axis of the sirocco fan 10 extends in parallel with the front surface of the casing in the width direction of the casing 1 (direction perpendicular to the paper surface). Further, drain pans 6a and 6b are arranged below the heat exchangers 5a and 5b and above the sirocco fan 10, respectively. The space between these drain pans 6a and 6b functions as a ventilation path 7 to the sirocco fan 10. As shown in FIG. 1, the sirocco fan 10 has a plurality (four in this case) of sirocco fans 11 fixed to the rotating shaft 13 of one drive motor 12 at an appropriate interval, and this drive Driven by motor 12. As shown in FIG. 2, the air outlet 14 of the sirocco fan 10 communicates with the air outlet grill 4 via the air outlet of the partition plate 15 that partitions the inside of the casing into a suction side and an air outlet side.

[0016] The indoor unit of the present invention operates as follows.

When the wall-mounted indoor unit is operated, room air is sucked from the first suction grill 2 of the casing 1 as indicated by arrow A and room air is sucked from the second suction grill 3 as indicated by arrow B. The indoor air sucked from both suction grilles 2 and 3 is cooled or heated after passing through the heat exchangers 5a and 5b, respectively, and then sucked into the sirocco fan 10, and the blow grill 4 force is also indicated by the arrow C (see Fig. 2). So that it is blown forward and downward.

[0018] According to the wall-mounted indoor unit of the air conditioner of the present invention, the plurality of sirocco fans 11 are arranged below, and the heat exchangers 5a, 5b are arranged in an inverted V shape above them. did As a result, the two heat exchangers ^ a and 5b can be crossed at an acute angle, and the depth of the indoor unit can be reduced.

[0019] Further, since a plurality of sirocco fans 11 are used as in-machine circulation fans, the depth dimension of the indoor unit is reduced, the cross-sectional area of the air passage in the casing 1 is reduced, and the ventilation resistance is reduced. Despite this increase, the fan's static pressure will not be insufficient. Therefore, by reducing the diameter of the impellers of the plurality of sirocco fans 11, the depth dimension of the casing 1 can be reduced.

[0020] Further, in the casing, drain pans 6a and 6b provided below the heat exchangers 5a and 5b can be disposed above the sirocco fan 10. For this reason, it becomes easy to secure the height required for drainage of the drain accumulated in the drain pans 6a and 6b.

[0021] In addition, since the blowout side of the plurality of sirocco fans 11 communicates with the blowout grill 4, and the heat exchangers 5a and 5b are arranged on the suction side of the sirocco fan 11, the heat exchangers 5a and 5b The wind speed distribution can be improved.

[0022] Further, a second suction grille is provided on the upper surface of the casing 1, and the heat exchanges 5a and 5b are inclined from the straight line parallel to the first suction grille to the lower rear side of the casing 1 from the upper end of the straight line. Therefore, the room air is evenly ventilated for the front side heat exchange 5a and the back side inclined heat exchange.

[0023] In the plurality of sirocco fans 11, the air outlet 14 is directed obliquely downward via a partition plate 15 that partitions the inside of the casing 1 into a suction side and a blow-out side. Therefore, it is possible to easily form a structure in which the blown air is blown downward while the height of the front surface of the casing 1 is kept small.

[0024] Further, since the plurality of sirocco fans 11 are attached to the rotary shaft 13 of one drive motor 12, the number of components can be reduced, and the cost can be reduced.

[0025] The present invention can also be implemented in the following modes.

[0026] The number of motors 12 that drive the sirocco fan 11 is arbitrarily set. Two drive motors 12 may be arranged on the left and right of the multiple sirocco fans 11, and two sirocco fans 11 may be attached to each motor, or a drive motor may be arranged for each sirocco fan 11. .

Claims

The scope of the claims

[1] A main body casing having a first suction grill on the front surface and a blow-off grill below,

A tube-type heat exchange with fins arranged in a polygonal line in the main body casing;

With multiple sirocco fans arranged below the heat exchanger ^^ so that the rotation axis is parallel to the front of the main casing

A wall-mounted indoor unit of an air conditioner characterized by comprising:

[2] The wall-mounted indoor unit of an air conditioner according to claim 1, wherein the plurality of sirocco fans are arranged so that the blowout side communicates with the blowout grill.

[3] The main casing has a second suction grill on the upper surface, and the heat exchanger is arranged in an inverted V shape, which is a combination of a straight line parallel to the front grille and a straight line that tilts forward and rearward. The wall-mounted indoor unit for an air conditioner according to claim 2, wherein:

[4] The wall-hanging type of the air conditioner according to claim 3, wherein the plurality of sirocco fans have their outlets directed obliquely downward via a partition plate that partitions the inside of the main casing into a suction side and a blowout side. Indoor unit.

[5] The wall-mounted indoor unit for an air conditioner according to any one of claims 1 to 4, wherein the plurality of sirocco fans are attached to a rotating shaft of one drive motor.